Residents look at a 21-foot saltwater crocodile after it was caught Bunawan, Philippines, on Sept. 4. It is the largest crocodile caught in the country to date, according to the Palawan Wildlife Rescue and Conservation Center. Reuters

Residents use their hands to measure a 21-foot saltwater crocodile in Bunawan, Philippines, on Sept. 4. The locals have named the crocodile 'Lolong,' and it is destined for a planned ecotourism park in the Philippines. Reuters

An anaconda about 16 feet long was captured by environmental police in Uberaba, Brazil, on Jan. 19. L. Adolfo/AE/Newscom/File

Zookeepers capture a komodo dragon at the Ragunan Zoo in Jakarta, Indonesia, on Feb. 10, 2010. A pair of male and female komodo dragons from Jakarta zoo were bound to Nyiregyhaza Allatpark Zoological Park in Hungary as part of the Indonesian government's five year breeding loan agreement with Hungary. The endangered giant reptiles can only be found on Indonesia's Komodo island. Akhmad Fuadi/AFP/Getty Images/Newscom/File

Tres Ammerman caught an alligator in Orlando, Fla., that measured a whopping 14 feet, 3 1/2 inches in 2010 on the last night of Florida's alligator hunting season. He brought the gator home and stored it in his garage until the Florida Fish and Wildlife Conservation Commission came to measure it and make it official that he had broken the record. Larry Paci/Splash News/Newscom/File

People rescue a giant turtle along the Jomo Kenyatta public beach in the coastal town of Mombasa, Kenya, in 2009. Three turtles drifted to the shores of the Indian Ocean and one was killed by illegal fishermen. Joseph Okanga/Reuters/File

A zookeeper weighs an Aldabra giant tortoise at the Artis Zoo in Amsterdam on Aug. 10. The tortoises are weighed every two years to check their health. Michael Kooren/Reuters/File

The giant Iguana is believed to descend from the herbivorous dinosaur iguanadon, which stood 4 feet tall on its hind legs. It has evolved into a much less fearsome size, and is found in the rainforests of Mexico, Central America, Fiji, and Papua New Guinea. Robert and Heidi Garnett walk with their Iguana 'Rocky' in Essex, England, in 2006. Colin Davey/Zuma Press/Newscom/File